Abstract Copper(Ⅱ) acetylacetonate was synthesized at room temperature by using basic copper carbonate and acetylactone as starting materials. The optimized reaction conditions were as follows: the molar ratio of basic copper carbonate to acetylacetonate was 1:4, and the reaction time was 2 h. The yield reached 99%. The product was characterized by IR and elemental analysis. This method possesses the advantages of simple operation, convenient aftertreatment process, high purity, and good yield. At the same time, the chemicals synthesized by the undergraduate students were reused effectively.